Film cartridge for photographic cameras



Dec. 15, 1953' H. NERWIN 2,662,696

FILM CARTRIDGE FOR PHOTOGRAPHIC CAMERAS Filed March 29, 1951 2 Sheets-Sheet 1 I N V EN TOR. HUBERT NE RW/N W7 A T THRIVE? Dec. 15, 1953 H. NERWIN 2,652,696

I FILM CARTRIDGE FOR PHOTOGRAPHIC CAMERAS Filed March 29, 1951 2 Sheets-Sheet 2 A T TOR/V57 Patented Dec. 15,

r' r J ea a corporation The present n, cartridge for use in 15h One object of this. v film-holding cartridg Q 1" film may be wound and w pied to or disconnected driving mechanism iii a I insertion into 2. ca era of W quick removal iro 7 exposed film has b n Another object thi a fi i cartr d e ,e; into which the lead end of on of n and quickly be threadgdg evg n I t e dak nd which is, therefore, especially sui able for mili- 15 tary use. i.

A u t r ieetott a film holding cartridg and which therefore an s in daylight as a f n posed roll of film therein Another objectof this a film-holding cartridge" of, which will be iigiipgtilgm thagiiitniay j x a package in wh h t afe A ex se .nl mir 25 safely be shipped to a point where it can be developed. .7 Another object of the v x v a film-holding cagrt'rid W ,fio m whi apof v which exposed film" efiirwo d; can i" be removed even the d'atk, e. Another object or the "'vritidii ito' a film-holding cartridg yyhiqh 01a imum number of readily fissenibla'hle or disas- .i semblable n i lm l s f Astill further object or the iiver'it E dy l'porti 'noi my'erheaps for the carv t e 15065 been at vthe cartridge from iioint rei'n' the view the seale oi Fi. 1

n" .n ip

h type;

e film-cartridge which the two end' caps that they are intrclieri'geeb r 7 Another object of tl'ie' i'xiventi'o {of me; a film-holding cartridge-whit, 45 I I recital of the appende'ieiiiims; v m 5 the bodxjfl aindla portion In thedraiwingsf A 2st: n epedy *"jn 11y; parallelto per. Fig. 1 is an axiai seetioiiptakenen th 1; {56 1 35 a r i, i i.

artfid. 6 of the the lip 26 for strength.

Near its opposite ends the body portion 20 is crimped as denoted at 35 (Fig. .4). to provide par allel arcuate recesses or grooves 36 which extend I around the major portion or the body. The

skirt portion 35 of each of ithefca'p members 2| and 22 is formed by crimpin'g'with three equiangularly spaced teats 31 which are adapted to be engaged in the recesses 38 to hold the caps" on the body portion 20.

Both caps 2| and 22 are lined with plush '45 for light-tightness. Each cap is generally pearshaped in cross section, and has its'skirt 35 and end cut away as denoted at to provide room for the portions 25 and 26 of the body portion to project beyond the cap. These projections serve to prevent relative angular displacement of the caps on the body portion when assembled thereon. The caps 2| and 22, as well as the body portion 20, are made of metal of thin section so that they are resilient; When the caps are pushed over the ends of the body portion, the skirts 35 of the caps compress the body portion to fit within the caps and confine the body portion; and the teats 31 "on the'caps snap into the grooves 36 of the body'portion to securely hold the caps on the body portion.

The core 24 has'circular' recesses 40 formed in its opposite ends. It has a bore 42 extending clear through it from one end to the other which is cross-shaped in transverse section. Each cap 2! and 22 has a central opening extending through it bounded by'a circular flange 44 (Fig. 1). Each flange 44 is enga'geable in one of the end recesses 40 of the core 24; and the two flanges 44 serve as bearings and as light traps for the core. Because of the centralfopenings in the caps 2| and 22' and because of bore 42, the bore of the core is accessible from either end of the core, and can be engaged at either end with the driving key of the camera in which the cartridge is being used. f 1

Hingedly mounted on, the periphery of the core 24 is a thin sectioned plate 50 (Figs. and 6) which is formedat its opposite ends with hooks 5!. The two hooks 5| are'spaced apart a distance equal to the distance between the two rows of perforations 52 in the film F (Fig. 11) which is to be used in the camera for which the. filmcartridge is adapted. f

The hooked plate 50 is hingedly mounted on the core 24 by means of a pin 55 (Figs. 5 and 8) and this hooked member-50 is constantly urged outwardly away from the periphery of the core by a coil spring 56, which'surro'unds hinge-pin 55 and which engages at one end 51 in 'a recess 58 (Fig. 6) in the core andwhich abuts at its opposite end 59 against'the hooked member 50. The hinge pin 55 is secured in the core' by heating the core andpressing-the core so that the axial groove 60 (Fig. 8) will engage about and hold the pin. 1 Y, j

The core is formed with "a peripheral groove 5! to receive the end59 of the spring 56 and with an axially-extending peripheral recess 62 shaped to receive the hooked member 50 when the hooked member is pressed against the. core .4. I by film wound on the core. The periphery of the core may be slabbed off adjacent both ends as denoted at 64 (Fig. 6) to receive and clear the hooked portions 5| of the member 50.

In use, it is easy to quickly assemble the cartridge. The core 24 can be seated on the bearing portion 44 of one of the caps; the body portion 20 of the cartridge can then be shoved into this cap; and the other cap can be shoved onto the body portion 20 of the cartridge.

When the core in the cartridge is to be used as the take-up core in a camera, the cartridge is positioned in the camera and the driving key or other driving 'mechanism of the camera is engaged in one-end of the bore of the core carried by the cartridge. Then the lead end of film F from the-supply'core of the camera is inserted through the mouth of the body portion 20 of the cartridge 20, as shown in Fig. 7, and the core 24 is rotated clockwise, as" viewed in Fig. '7, by the key or other driving'mechanism of the camera, so as to bring the hooks 5| into engagement with the perforations 52 in the film, as shown in Fig. 8. After a suificient amount of film has been wound on the take-up core to bring an unexposed portion of the film into picture-taking position, a picture can be taken. Then after successive portions of the film are exposed, the film may be wound in the camera by rotating the core 24. The film winding 'on' the core wraps over and around the hook member 50 and presses the hook memberinto'the recess 52 in'the periphery of the core, as shown in Fig. 9.

After all of the film has been exposed, the whole cartridge can be removed from the camera, and a new cartridge positioned therein, or the cartridge which has previously been used as the supply cartridge can be shifted to the takeup position in the camera and a new cartridge loaded with film can be introduced into the camera. The cartridge with the exposed film therein is light-tight and provides a ready case for keeping or shipping the film until it can be developed. To remove the core with the exposed film thereon from the cartridge all that is necessary to do is'to remove one of the caps 2| or 22 and lift the core out. This can be'done readily in the dark. ,A new core with unexposed film there on can just as readily be placed in the cartridge case inthe dark and the cap 2! or 22, which has been removed, can then readily be replaced.

The cartridge or cassette of the present invention has definiteadvantages for military puror a long trailer. This reduces winding time both before and after exposure to a minimum; the camera is ready for picture taking almost by loading it with a cartridge. Moreover, the film core is designed so that it can be engaged oneither end with the driving key of the camera for rotation in either direction. The cartridge, however, has to be inserted in the camera in the proper direction to have the film seat properly in the exposureopening. Furthermore, when a roll, of exposed film has been wound on the core in the cartridge, the film is securely protected and can safely be sent to a developing point. All these advantages have application also in civilian uses.

While the invention has been described in connection with a specific embodiment thereof, it will be understood that it is capable of further modification, and this application is intended to cover any variations, uses, or adaptations of the invention, following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains and as may be applied to the essential features hereinbefore set forth and as fall Within the scope or the invention or the limits of the appended claims.

Having thus described my invention what I claim is:

1. A roll film cartridge for photographic cameras comprising a housing having an axiallyextending slot therein through which film may be introduced into or fed out of said housing, said housing being closed except for said slot, a core rotatably supported in said housing, and a member projecting from the periphery of said core, said member having a hook portion on its projecting end and being resiliently urged into proximity with the inside wall of said housing so that said member is in position to engage a perforation in the lead end of a strip of film after said lead end has been introduced through said slot into said housing and said core has been rotated to bring said projecting member into engagement with said perforation.

2. A roll film cartridge for photographic cameras comprising a flexible casing which has an axially-extending slot therein forming a mouth through which film may be introduced into or fed out of said casing, a pair of end caps removably positioned over the ends of said casin to compress said casing and to close the opposite ends of said casing, a rotatable core having a bore extending axially therethrough, and a member projecting beyond the periphery of said core and constantly urged resiliently into proximity with the inside wall of the compressed casing to engage a perforation in the lead end of a roll of film to drivingly engage said lead end when said lead end is introduced into said casing and said projecting member has been rotated into engagement with said perforation, each of said end caps having a central opening therethrough aligned with the bore of said core and through which a driving member of the camera may be introduced into said bore, said core having an annular recess in each end, and each of said end caps havin an annular flange surrounding its central opening which engages in the annular recess in the adjacent end of said core and constitutes a bearing and light trap for said core.

3. A roll film cartridge for photographic cameras comprising a flexible casing which has an axially-extending slot therein and which has two lip portions bounding said slot to form a mouth through which film may be introduced into or fed out of casing, said lip portions being covered with a compressible material providing a normally light-tight closure for said mouth, a pair of end caps removably mounted on said casing to compress said casing and to close opposite ends of said casing, a core having a bore extending axially therethrough, a member hingedly mounted on said core and having a, pair of hooks on its free end which are axially spaced to engage perforations adjacent opposite marginal edges of perforated film, and spring means constantly urging the free end of said hinged member away from the periphery of said core into proximity with the inside wall of the compressed casing, said core having a peripheral recess therein to receive said hinged member when depressed, each of said end caps having a central opening aligned with said bore through which a driving member of a camera may be introduced into said bore, said core having an annular recess in each end, and each of said end caps having an annular fiange around its central opening which engages in the annular recess in the adjacent end of said core and which serves as a bearing and light trap for said core.

4. A roll film cartridge for photographic cameras comprising a housing havin an axiallyextending slot therein through which film may be introduced into or fed out of said housing, said housing being closed except for said slot, a core rotatably supported in said housing, a member hingedly mounted at one end on said core and having a pair of hooks on its free end which are axially spaced to engage axially spaced perforations of perforated film, and spring means interposed between said hooked member and said core and constantly urging said member about its hinge axis away from the periphery of said core, the inside Wall of said housing being spaced from the periphery of said core a distance less than the maximum radial distance between the free end of said hooked member and the periphery of said core whereby said member is held in position so that its hook may engage with a perforation in the lead end of a roll of film after said lead end has been introduced into said housing and said core is rotated.

HUBERT NERWIN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 664,604 Bennett Dec. 25, 19 0 1,522,248 Johnson Jan. 6, 1925 1,799,748 Hayden Apr. 7, 1931 1,966 347 I-Iughey July 10, 1934 2,017,160 Parker Oct. 15, 1935 2,119,943 Marks June 7, 1938 2,153,573 Kinloch Apr. 11, 1939 2,481,665 Henne Sept. 13, 1949 2,487,479 Roehrl Nov. 8, 1949 

